Improvement in heating-stoves



UNITED STATES PATENT OEEroEo JOHN D. AVIL, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN HEATING-STOVES.

Specification forming part of Letters Patent No. 163,441, dated May 18, 1875 5 application filed April 25, 1812.

To all whom t may concer-n:

Be it known that I, JOHN D. Av1L,of the city and county of Philadelphia, in the State of Pennsylvania, have invented certain Improvements in Heating-Stoves, ot' which the following is a specification:

My invention is of an improvement in what may be called a double-cylinder stove for warming or heating air in the room in which the stove is located, and also in the room above it, or in the second story 5 and myinvention Consists in the peculiar construction and combination of a plate having openings at its periphery with the inner cylinder of the stove, forthe purpose of better equalizing the heat of the air oi' both the upper and lower rooms, as will be more fully described herein, with reference to the accompanying drawing, in which- Figure l is a vertical section of the stove A and chimney G, with which it is connected. Fig. 2 is a vertical section ofthe stove at right angles to Fig. l. Fig. 3 is a plan view of the double cylinders B and B. Fig. 4 is a side elevation of the same.

Like letters of reference in all the figures indicate the same parts.

A is the body of the stove. B and B are inner and outer cylinders, seen in detail in Figs. 3 and 4. rlhey are connected at bottom and top by means of the annular plates c d, leaving a central space, e, between it and the cylinder B. A collar, D, is connected wit-h the rear side of the inner cylinder B, which connects with the elbow j' of the smoke-pipe E, that passes up through the iiue F of the chimney G. At opposite sides of the stove there are short pipes, H H, through which the external air passes into the annular space e between the cylinders B and B. The rear side ofthe outer cylinder B is provided with a collar, I, that connects with the surrounding hot-air pipe I', the said pipe communicating with the flue F of the chimney. rlhe bottom of the cylinders inclines downward, as seen in Figs. l, 2, and 4, so as to incline the heat from the nre-place P to the rear part of the stove, and thus to spread it around the stove in the annular space g. y

The operation of my invention is as follows The hot gaseous products of combustion,

together with the air-draft through the incandescent fuel of the nre-pot, pass directly upwardone portion through the openings at the periphery of the plate L, and the remaininggor larger portion through the annular space g to the space d, and then downward into C, where it meets the portion which is rising from the openings around the periphery of the plate L, and, mingling, together pass into the exit-pipe E, and escape into the chimney at any suitable point above the register K, which communicates with the hot-air tlue F at any suitable place above the lioor m in the second story of the building, or the next story above thatin which the heatingstove is placed. The space between the sides of the upper end ot' the pipe E and of the llue F, just above the register K, is of course intended to be closed in an air-tight manner.

The air which is to be heated enters the pipes H H into the annular space e, and is heated by the hot gaseous products of com` bustion,whioh pass from the lire-chamber of the stove upward through the annular space g, and then kdownward into G, and also by the hot products of combustion, which at the same time pass upward through the open spaces in the periphery of the plate L into-O, and the air thus heated in the annular space e passes horizontally through the short pipe I into and upward through the iiueF, to and out through the opened register K into the room in the second story ot' the. building, the said air havingbeen still further heated during its passage through the iue F by the heat radiated by the smoke-flue E. During the operation of heating air for the room in v-the second story, as just described, the outside walls of thestove, being strongly heated by the gaseous products of combustion passing upward through g into C, radiate sufficient heat to warm the air in the room in which lthe stove is located; and it will be readily seen that if' the plate L were dispensed with, nearly all the hot products of combustion, and the heat radiated by the incandescent fuel also, would pass into C, and thence directly into the smoke-pipe, and consequently the outside walls of the stove would not be suflicientlyheated `to warm the air of the room in which the stove is located, and, moreover, the air in e would not be so strongly heated. The effect of the plate L is, therefore,

to divide the hot gaseous products of combustion between g and C, in order to more nearly equalize the heated air of the first and second story rooms.

I claim as my invention-- AThe combination, in an air-heating stove, substantially as described, of the plate L provided with openings at its periphery, as described, With the cylinders B and B', which surround the central. space G, for the purpose hereinbefore described.

JOHN D. AVIL. Vitnesses:

THOMAS J. BEWLEY, STEPHEN UsTIoK. 

